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Scorpion envenomation as a risk factor for development of dilated cardiomyopathy

T Sundararaman1, M Olithselvan, K R Sethuraman

  • 1Dept. of Medicine, Jawaharlal Institute of Postgraduate Medical Education and Research, Pondicherry, India.

The Journal of the Association of Physicians of India
|June 22, 2000
PubMed

Insights

A history of scorpion stings significantly increases the risk of developing idiopathic dilated cardiomyopathy. Even after recovery, scorpion envenomation may lead to long-term heart issues.

Area of Science:

  • Cardiology
  • Toxicology
  • Epidemiology

Background:

  • Scorpion envenomation can cause acute myocarditis and temporary left ventricular dysfunction.
  • Idiopathic dilated cardiomyopathy (IDCM) has multifactorial causes, but specific etiological links are often unclear.
  • The role of scorpion stings in the long-term development of IDCM has not been previously established.

Purpose of the Study:

  • To investigate the association between a history of scorpion envenomation and the development of idiopathic dilated cardiomyopathy.
  • To explore other potential risk factors for IDCM, including socio-economic status, lifestyle choices, and other environmental exposures.

Main Methods:

  • A case-control study design was employed to assess risk factors for IDCM.
  • Cases of IDCM were compared against two control groups: age- and sex-matched inpatients and spouse/relatives.
  • Statistical analysis was performed to determine the association between various factors and IDCM.

Main Results:

  • Scorpion envenomation emerged as the only significant risk factor associated with IDCM.
  • A history of scorpion sting showed a significantly elevated odds ratio (8.01-8.33) for developing IDCM compared to both control groups.
  • Other studied factors like smoking, alcoholism, and rural habitation did not demonstrate a significant association with IDCM.

Conclusions:

  • A history of scorpion envenomation is a significant risk factor for the subsequent development of idiopathic dilated cardiomyopathy.
  • Sub-clinical cardiac deficits following scorpion stings may predispose individuals to cardiomyopathy later in life.
  • This finding supports the hypothesis linking catecholamine excess, potentially triggered by scorpion venom, to cardiac dysfunction and cardiomyopathy development.
Abstract

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